Presentation
A normalized variability index of daily solar radiation
Author/s | Moreno Tejera, Sara
Larrañeta, Miguel Lillo Bravo, Isidoro Silva Pérez, Manuel Antonio |
Department | Universidad de Sevilla. Departamento de Ingeniería Energética |
Publication Date | 2020-12 |
Deposit Date | 2021-03-23 |
Published in |
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ISBN/ISSN | 9780735440371 0094-243X |
Abstract | The Variability Index (VI) is widely used to quantify the intra-day solar radiation variability. It compares the
length of the global horizontal irradiance (GHI) or direct normal irradiance (DNI) profiles with the length ... The Variability Index (VI) is widely used to quantify the intra-day solar radiation variability. It compares the length of the global horizontal irradiance (GHI) or direct normal irradiance (DNI) profiles with the length of the corresponding clear sky GHI/DNI profiles. The VI is not a normalized index, it shows dependency on the day of the year, geographic location and time resolution. Thus, the quantification of the intra-day variability of the solar resource between different locations or different seasons could be mistaken. In this work, we propose a novel definition of the VI in order to normalize it (VI’). Moreover, we suggest a methodology to assess the dependencies of the intra-day solar resource variability quantifiers with the day of the year, geographic location and time resolution. We evaluate and compare the performance of both indexes in two different locations along two synthetic years and a measured annual dataset in different time resolutions. |
Funding agencies | International Energy Agency Photovoltaic Power Systems Programme |
Project ID. | (IEA-PVPS) Task 16 |
Citation | Moreno Tejera, S., Larrañeta, M., Lillo Bravo, I. y Silva Pérez, M.A. (2020). A normalized variability index of daily solar radiation. En International Conference on Concentrating Solar Power and Chemical Energy Systems, SolarPACES 2019 Daegu, South Korea: American Institute of Physics Inc.. |
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